Anyone using the center versions in middle school? How do you like them? Is there another program/kit that you prefer over these. I am trying to find some centers for middle school fifth that doesn't have to be changed regularly that does a spiral review that the students can do independently.

I've used the Mtn lang and math flipchart for centers with 4th and 5th grade students. I love it! The kid work on groups of 3 and its nice to hear some of their discussions. If you have reluctant kids or kids that like to let other do the work I have found pairing them together works best.